v0.20.8

MPI v0.20.8

Diff since v0.20.7

Closed issues:

• Prevent loading startup file for tests (#708)

Merged pull requests:

• Update docs/examples/09-graph_communication.jl (#703) (@fredrikekre)
• [CI] Use newer versions of some GitHub actions (#704) (@giordano)
• [MPIPreferences] Explicitly list valid options in error thrown by use_jll_binary (#705) (@giordano)
• Consistently use Base.julia_cmd() in tests (#706) (@giordano)
• Add MPI.Dist_graph_neighbors (#707) (@fredrikekre)
• simplify topology code, use MPI.UNWEIGHTED instead of nothing (#709) (@simonbyrne)
• Do not load start up file when running tests (#710) (@giordano)
• Tag v0.20.8 (#712) (@simonbyrne)